美国加州三藩市湾区,周四发现一条濒临绝种的灰鲸尸体,西岸单在本年已经累积54条搁浅或者死亡,创下近19年新高数字。
生物学家认为,全球暖化令海水温度升高,导致海中的食物不足,结果令灰鲸活活饿死。
索萨利托海洋哺乳动物中心派员寻找鲸尸,将会验尸以确定死因。当地每年通常只会发现10条鲸尸,惟本年尸体数量剧增,甚至直逼2020年同期的86条。专家推测只有不足一成的鲸尸会被冲上岸,意味灰鲸本年的死亡数字或逾530条。
在太平洋出没的灰鲸目前约有2万条左右,通常会以小组形式迁徙,惟部分会在长达数月的迁徙过程当中饿死。除了灰鲸外,加州海狮等大型哺乳类动物亦出现营养不良情况。#
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